Resonant optical transmission through a one-dimensional photonic crystal adjacent to a thin metal film |
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Authors: | Chang-Sheng YuanHan Tang Cheng HeXiao-Lin Chen Xu NiMing-Hui Lu Yan-Feng Chen Nai-Ben Ming |
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Institution: | National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, People''s Republic of China |
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Abstract: | We theoretically and experimentally reveal that the large resonant optical transmission (ROT) can be realized through a one-dimensional photonic crystal adjacent to a thin metal film, at a frequency in the original band-gap of the photonic crystal (PC). The influence of periodic number of PC and the thickness of the adjacent metal on the transmission frequency and intensity is studied in detail. An optimum design is given to reach the maximum transmission efficiency, meanwhile a mechanism underlining the ROT phenomenon is proposed. An effective admittance-matching theory is proposed to understand this effect and quantitatively determine the operating frequency, which matches very well with the simulated and measured results. The effects might be very useful to realize some optical filters and sensor devices since the structure is easy for mass production and is matured technically to be prepared in industry. |
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Keywords: | Photonic crystals Resonant optical transmission Effective admittance-matching theory |
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